Truncate rss text - Joomla! Forum - community, help and support

hello!
i must truncate rss text, don't know how. if edit /libraries/joomla/document/feed/renderer/rss.php, line 125:

code: select all

$feed.= "         <description><![cdata[".($this->_reltoabs($data->items[$i]->description)."]]></description>\n";

to

code: select all

$feed.= "         <description><![cdata[".substr($this->_reltoabs($data->items[$i]->description),0,700)."]]></description>\n";

then lose </td>, >/tr>, >/tbody>, >/table>

as feed display module has feature show number of words, should see how being done. may provide valuable information.